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Date: Fri, 28 Apr 2006 20:09:50 +0100
From: Brian Candler <B.Candler@pobox.com>
To: Julian Elischer <julian@elischer.org>
Message-ID: <20060428190950.GB17435@uk.tiscali.com>
References: <F6E1228667B6D411BAAA00306E00F2A50562296B@pdc2.nestec.net>
	<445109F1.6050300@elischer.org>
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Cc: "'freebsd-net@freebsd.org'" <freebsd-net@freebsd.org>,
	JOBY THAMPAN <JOBYTHAMPAN@nestec.net>
Subject: Re: DHCP Over PPPoE
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On Thu, Apr 27, 2006 at 11:14:09AM -0700, Julian Elischer wrote:
> 
> 
> A few things..
> 
> 1/ thisn is a FreeBSD list so we are not very familiar with linux.
> 2/ PPPOE uses PPP which is a point-to-point protocol and does not support
>   broadcast.
> 3/ DHCP is a broadcast protocol and does not support point-to-point
>  networks.
> 4/ PPP (oE)  has its own IP allocation mechanism.

But note that he is using DHCP relaying to a remote DHCP server. This
original DHCP broadcast is picked up and turned into a unicast message for
relaying to the DHCP server. This works quite happily over PPP or indeed any
intervening IP network and any number of hops.